/*

 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test TestCrashOnOutOfMemoryError

 * @summary Test using -XX:+CrashOnOutOfMemoryError

 * @modules java.base/jdk.internal.misc

 * @library /testlibrary

 * @build jdk.test.lib.*

 * @run driver TestCrashOnOutOfMemoryError

 * @bug 8138745

 */

import jdk.test.lib.OutputAnalyzer;

import jdk.test.lib.ProcessTools;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStreamReader;

import java.io.IOException;

public class TestCrashOnOutOfMemoryError {

    public static void main(String[] args) throws Exception {

        if (args.length == 1) {

            // This should guarantee to throw:

            // java.lang.OutOfMemoryError: Requested array size exceeds VM limit

            try {

                Object[] oa = new Object[Integer.MAX_VALUE];

                throw new Error("OOME not triggered");

            } catch (OutOfMemoryError err) {

                throw new Error("OOME didn't abort JVM!");

            }

        }

        // else this is the main test

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+CrashOnOutOfMemoryError",

                 "-XX:-CreateCoredumpOnCrash", "-Xmx64m", TestCrashOnOutOfMemoryError.class.getName(),"throwOOME");

        OutputAnalyzer output = new OutputAnalyzer(pb.start());

        int exitValue = output.getExitValue();

        if (0 == exitValue) {

            //expecting a non zero value

            throw new Error("Expected to get non zero exit value");

        }

        /* Output should look something like this. The actual text will depend on the OS and its core dump processing.

           Aborting due to java.lang.OutOfMemoryError: Requested array size exceeds VM limit

           # To suppress the following error report, specify this argument

           # after -XX: or in .hotspotrc:  SuppressErrorAt=/debug.cpp:303

           #

           # A fatal error has been detected by the Java Runtime Environment:

           #

           #  Internal Error (/home/cheleswer/Desktop/jdk9/dev/hotspot/src/share/vm/utilities/debug.cpp:303), pid=6212, tid=6213

           #  fatal error: OutOfMemory encountered: Requested array size exceeds VM limit

           #

           # JRE version: OpenJDK Runtime Environment (9.0) (build 1.9.0-internal-debug-cheleswer_2015_10_20_14_32-b00)

           # Java VM: OpenJDK 64-Bit Server VM (1.9.0-internal-debug-cheleswer_2015_10_20_14_32-b00, mixed mode, tiered, compressed oops, serial gc, linux-amd64)

           # Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %P" (or dumping to

             /home/cheleswer/Desktop/core.6212)

           #

           # An error report file with more information is saved as:

           # /home/cheleswer/Desktop/hs_err_pid6212.log

           #

           # If you would like to submit a bug report, please visit:

           #   http://bugreport.java.com/bugreport/crash.jsp

           #

           Current thread is 6213

           Dumping core ...

           Aborted (core dumped)

        */

        output.shouldContain("Aborting due to java.lang.OutOfMemoryError: Requested array size exceeds VM limit");

        // extract hs-err file

        String hs_err_file = output.firstMatch("# *(\\S*hs_err_pid\\d+\\.log)", 1);

        if (hs_err_file == null) {

            throw new Error("Did not find hs-err file in output.\n");

        }

        /*

         * Check if hs_err files exist or not

         */

        File f = new File(hs_err_file);

        if (!f.exists()) {

            throw new Error("hs-err file missing at "+ f.getAbsolutePath() + ".\n");

        }

        /*

         * Checking the completness of hs_err file. If last line of hs_err file is "END"

         * then it proves that file is complete.

         */

        try (FileInputStream fis = new FileInputStream(f);

            BufferedReader br = new BufferedReader(new InputStreamReader(fis))) {

            String line = null;

            String lastLine = null;

            while ((line = br.readLine()) != null) {

                lastLine = line;

            }

            if (!lastLine.equals("END.")) {

                throw new Error("hs-err file incomplete (missing END marker.)");

            } else {

                System.out.println("End marker found.");

            }

        }

        System.out.println("PASSED");

    }

}